Car truck



Patented May 6,1930

UNITED STATES PAU'I. J. MccULLoUGH, or sr LoUIs,-1vIIssoUIt-I, AssIGNoR 'ro scULLIN STEEL coluim'ra'ra'rA oFFicE PAN'Y, OF ST. LOUIS, MISSOURI, A-CORPORATION OF MISSOURI CAR TRUCK Application4 mea November This invention relates to car trucks of thetype that vare equipped With lateral inotion devices for the bolster, consisting of horizontally-disposed rollers arranged trans- 5 versely ofthe bolster bet-Ween roller seats formed on the undersidelof the end portions l of the bolster, and roller seats formed in theA spring caps that rest -upon the bolster supporting springs.Y The in ain object of my invention is to pro# vide a car truck of the general type mentioned7 in which the spring caps that serve as seats for the rollers on which the bolster rests,

are provided at their ends With extensions of the bolster and bear upon bolster supporting springs whose major portions are located beyond or outside of the spring plank,

thereby producing 'a car truck that has suflicient bolster supporting spring capacity to takecare of exceptionally heavy loads or abnormal loads and Whose spring caps serve as load carryingv membersl that eifectively equalize the bolster load on the bolster support-ing springs. y

Another object `is to provide a car truck tfhat is equipped witha spring plank of novel orrn. r

Figure 1 of the drawings is a fragmentary top plan View, illustrating my intention and showing a portion of one side frame7V a portion of the bolster.' and o'ne group of bolster supporting-springs.

'Figure Q'Iis a fragmentary side elevational View of vthe structure shown in Figure 1.

-Figure 3"is a horizontal sectional View, taken on the-line 3--3 of Figure 2, looking in the direction indicated by the arrows; and Figure 4 is a vertical sectional View, taken on the line Ll--4o'f Figure 2.

My improved car truck comprises two side frames A, a transversely-disposed bolster B whose end portions are positioned in openings in the side frames, a transversely-disposed spring vplank-C arranged under the bolster andinterlockedor connected in any preferred manner with the sidelfraines, twoV groups of bolster supporting springs? hereinafter more fully described, aV sprin cap D associated with each of said groups o springs that project laterally beyond the side edges;

5, 1928. Serial No. 317,264.

and arranged at the upper end of the springs.

and a set of rollers E interposed between each of said spring caps and the opposed end portion of the bolster. The rollers Eextend" transverselyof the bolster Iand are arranged in seatssforined in the top faces of the 'spring c aps D and in the underside of the end 'portions of vthe bolster and operate in the same wav .as conventional lateral motion devices of the roller type.

The. bolster supp of being arranged entirely Within the zones in which the end vportions ofthe bolster-he,

are arranged so that the major portions of soine of the springs in each groupof springs will .be located at points outside of or beyond the side edges of the bolster and in the vertical planes of the columns F of the side frames that guide the bolster and which form the sides of the bolster-receiving openings in the vside frames. In the form of my invention herein illustrated each group of bol- 60 orting springs, instead' ster supporting springs comprises a set of .center springsK G that lie directly underneath I' the end portioniof the-bolster andv two end springs G Whose major portions are located at points beyond or outside of the bolster, the set of center springs G being made up of four, five or Aany 'preferred numberv of springs.

In orderthat the -load on the bolster will be effectively equalizedbyethe bolster supporting springsand distributed substantially uniformly or evenly toall of the springs of 1 each group,' each of the spring caps'D is provided at its ends with extensions D' that lap over and bear upon the 'end springs G of the group of springs with Which'said .ca-p cooperates.' The center set of springs of, each group are carried or supported by the spring plank C, and preferably rest upon a remov- A able spring seat member C' positioned on Athe spring plank, but theend sprin s G' of each group are carried or supported y vhorizontally-,disposed vspring seats H, shown in broken linesin FigureQ, that are formed byhbrizontvallyfdisposed` integral portions of the side frames thatare located at the lower ends of the columns F. The top faces of said spring seats H preferably extend flush with f Y the top face of the spring plank, but if desired, the spring seats H can.be arrangedl in a slightly lower horizontal plane and shims.

can be interposed between the same and the end springs G. The columns F are constructed in such amanner that they will serve as, partial housings for the end springs Gr and also as guides for the end extensions D ofthe spring caps. In the truck herein shown each of the columns F comprises two vertically-disposed'side pieces that are spaced apart a distance equal to the width of the end extensions Gof the spring caps, as-shown 'in Figure 3. By constructing the truck in 'they will serve as load carrying members which transmit the' load on the bolster to springs that are arranged in the zone of the bolster and in zones that are located outside of or beyond the side edges of the bolster. 4

'Ihe spring plank C of my improved truck.

`instead of being formedl channel-shaped throughout its entire length, as is the usual practice, is provided adjacent its ends with recesses lor inwardly-projecting pockets C2, shown in Figure l, so as to permit the end springs G to be arranged nearer to tihe springs G that lie'in the zone of the bolster, this form of spring plank being highly advantageous, in that it permits the bolster supporting springs to be very compactly -arranged and also permits the center beams A of the tension members "of the side frame to be made of 'minimum length. Still another radvantage ofsuch aV spring plank is that the inwardly-projecting portions of the side' flanges of the spring plankC that form the recesses C2 for the end springs serve as spacing devices for the center .springs G that tend to insure said center springs -remain,-

v ing improperly spaced relation. The spring plank C may be connected to the side frames A in any preferred manner, but I prefer to equip the beamsl A of the side frames with upWardly-projecting-lugs A2, as shown in Figure 2, that project into holes formed in the web ofthe spring plank.

f I claim as new and desire Having thus descrl ed my invention, what to secure by Letters Patent is:

1. In a car truck, the combination of a side frame provided with a bolster opening, a bolster having an end portion that pro-v jects into said opening, a group of supporting springs for the bolster comprising end Y springs Whose major portions are 'located outside of or beyond the side edges of the bolster, a cap at the upper end of the springs provided with extensions that bear upon said end springs, and rollers arranged so as to bear directly on said cap and on the underside of the bolster.

2. In a car truck of the` kind described in claim 1, columns on the side frame that partially house said end springs and serve as guides for the extensionson said spring Cap. l l

3. In a car truck of the kind described in claim 1, integral portions on the side frame that serve as seats for said end springs, and colulnns on said side frame that partially house said end springs and serve as guides for'the extension on said spring cap.

4. In a car truck, the combination of a side frame provided with a bolster opening, a bolster whose end portion projects into said opening, columns at the sides of said opening that guide the bolster, supporting springs for saidbolster arranged in the plane of said `side frame and comprising end springs whose major portions are located outside of or beyondthe side edges of the bolster, and a lateral motion device for'equ'alizing the bolster load on said springs, provided with portions that move vertically within said columns.

5. In a car truck, the combination of a side frame provided with a bolster opening, a bolster whose end portion is positioned in said opening, supporting springs for the bolster comprising center springs that are arranged underneath 'the bolster and end springs whose `major portions are located at points beyond the side edges of the bolster, and a spring plan combined with the side frame and provided adjacent its ends with recesses for receiving said end springs.

6. In a car truck, the combination of a side frame provided Awith columns that form the sides of a bolster'opening, a bolster having its end portion positioned between said columns, a spring plank arranged under the bolster and connected to the side frame, a center set of supporting springs for the bolster carried by the spring plank, additional supporting springs for the bolster whose major Portions are arranged within the columns, supporting membersl for said additional spring carried by the side frame, a spring cap'that bears upon all of said springs,

and rollers interposed between said spring cap and the bolster.

v 7. In a car truck of the kind described in claiml 6, side flanges on the spring plank shaped so as to form inwardly-projecting pockets at the side edges of the spring plank in which said end springs are positioned.

, PAUL J. MCCULLOUGH'; 

